dottxt Models API

openapi: 3.1.0
info:
  title: dottxt Platform Chat Models API
  version: v1
  description: OpenAI-compatible structured-output API from dottxt (.txt), the makers of Outlines. The API guarantees 100% schema-compliant model output by construction using constrained decoding. It follows the OpenAI Chat Completions request/response shape, so existing OpenAI SDKs work by changing the base URL and API key. Structured output is requested with the `response_format` parameter (JSON Schema), and results can be streamed as token deltas (SSE) or field-by-field as RFC 6902 JSON Patch events. This specification is a faithful transcription of the public API reference at https://docs.dottxt.ai/api/overview ; it is not published by dottxt.
  contact:
    name: dottxt
    url: https://dottxt.ai/
    email: contact@dottxt.co
  x-provenance:
    generated: '2026-07-18'
    method: generated
    source: https://docs.dottxt.ai/api/overview.md
servers:
- url: https://api.dottxt.ai/v1
  description: dottxt production API
security:
- bearerAuth: []
tags:
- name: Models
  description: Models available to your API key.
paths:
  /models:
    get:
      operationId: listModels
      tags:
      - Models
      summary: List Models
      description: Return the list of models available to your API key.
      responses:
        '200':
          description: The list of available models.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ModelList'
        '401':
          description: Missing or invalid API key.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OpenAIErrorResponse'
components:
  schemas:
    Model:
      type: object
      properties:
        id:
          type: string
          example: openai/gpt-oss-20b
        object:
          type: string
          example: model
        owned_by:
          type: string
    ModelList:
      type: object
      properties:
        object:
          type: string
          example: list
        data:
          type: array
          items:
            $ref: '#/components/schemas/Model'
    OpenAIErrorResponse:
      type: object
      required:
      - error
      properties:
        error:
          type: object
          properties:
            code:
              type: string
            message:
              type: string
            type:
              type: string
            param:
              type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'API key passed as a bearer token: `Authorization: Bearer $DOTTXT_API_KEY`. Keys use the prefix `sk-dottxt-`.'